--- a/mauve/mingwmake.bat	Thu Sep 05 22:08:59 2013 +0100
+++ b/mauve/mingwmake.bat	Fri Sep 06 00:16:38 2013 +0100
@@ -8,7 +8,9 @@
 @FOR /F "tokens=*" %%i in ('hg root') do SET HGROOT=%%i
 @IF "%HGROOT%" NEQ "" SET DEFINES=%DEFINES% "-DHGROOT=%HGROOT%"
 
-@call ..\..\rules\find_mingw.bat
-make.exe -N -f bc.mak %USEMINGW_ARG% %*
+@pushd ..\..\rules
+@call find_mingw.bat
+@popd
+make.exe -N -f bc.mak %DEFINES% %USEMINGW_ARG% %*